package com.example.forum.services.impl;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.dao.ArticleMapper;
import com.example.forum.exception.ApplicationException;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.services.IBoardService;
import com.example.forum.services.IUserService;
import com.example.forum.utils.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;


@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {



    @Resource
    private ArticleMapper articleMapper;

    //用户和板块的操作
    @Resource
    private IUserService userService;
    @Resource
    private IBoardService boardService;


    @Override
    public void create(Article article) {
        //非空校验
        if (article==null||article.getUserId()==null ||article.getBoardId()==null
            || StringUtil.isEmpty(article.getTitle())
            ||StringUtil.isEmpty(article.getContent())){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //设置默认值
        article.setVisitCount(0); //访问数
        article.setReplyCount(0); //回复数
        article.setLikeCount(0);  //点赞数
        article.setDeleteState((byte) 0);
        article.setState((byte) 0);
        Date date = new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);

        //写入数据库
        int articleRow = articleMapper.insertSelective(article);
        if (articleRow <= 0){
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新用户的发帖数
        User user = userService.selectById(article.getUserId()); //获取用户信息
        //没有找到指定的用户信息
        if (user == null){
            log.warn(ResultCode.FAILED_CREATE.toString()+", 发帖失败，user id = "+article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新用户的发帖数
        userService.addOneArticleCountById(user.getId());

        //获取板块信息
        Board board = boardService.selectById(article.getBoardId());
        //是否在数据库中有对应的板块
        if (board==null){
            log.warn(ResultCode.FAILED_CREATE.toString()+", 发帖失败，board id = "+article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新板块中的帖子数量
        boardService.addOneArticleCountById(board.getId());

        //打印日志
        log.info(ResultCode.SUCCESS.toString()
                +", user id= "+article.getUserId()
                +", board id= "+article.getBoardId()
                +", article id = "+article.getId()+"发帖成功");

       // throw new ApplicationException(AppResult.failed("测试事务回滚"));
    }

    @Override
    public List<Article> selectAll() {
        //调用DAo
        List<Article> articles=articleMapper.selectAll();
        //返回结果
        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        //非空校验
        if (boardId==null||boardId<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //校验板块是否存在
        Board board = boardService.selectById(boardId);
        if (board==null){
            //打印日志
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString()+",board id ="+boardId);
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));

        }
        //调用DAO查询
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);
        //返回结果
        return articles;
    }

    @Override
    public List<Article> selectByUserId(Long userId) {
        //非空校验
        if (userId==null||userId<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //校验用户是否存在
        User user = userService.selectById(userId);
        if (user==null){
            //打印日志
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString()+",user id ="+userId);
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        //调用DAO
        List<Article> articles=articleMapper.selectByUserId(userId);
        //返回结果
        return articles;
    }

    @Override
    public Article selectDetailById(Long id) {
        //非空校验
        if (id==null||id<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //调用DAO
        Article article = articleMapper.selectDetailById(id);
        //判断结果是否为空
        if (article==null){
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }

        //更新帖子的访问次数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount() + 1);
        //保存到数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            //打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //更新返回对象的访问次数
        article.setVisitCount(article.getVisitCount() + 1);
        //返回帖子详情

        return article;
    }

    @Override
    public Article selectById(Long id) {
        //非空校验
        if (id==null||id<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //调用DAO
        Article article = articleMapper.selectByPrimaryKey(id);
        //返回结果
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        //非空校验
        if (id==null||id<=0||StringUtil.isEmpty(title)){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //构建要更新的帖子对象
        Article updateArticle=new Article();
        updateArticle.setId(id);  //id
        updateArticle.setTitle(title);  //标题
        updateArticle.setContent(content);  //正文
        updateArticle.setUpdateTime(new Date());  //更新时间
        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            //打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));

        }
    }

    @Override
    public void thumbsUpById(Long id) {
        //非空校验
        if (id==null||id<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        //帖子不存在
        if (article==null || article.getState()==1 || article.getDeleteState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //帖子状态异常
        if (article.getState()==1 || article.getDeleteState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构造要更新的对象
        Article updateArticle=new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount()+1);
        updateArticle.setUpdateTime(new Date());

        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            //打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));

        }
    }

    @Override
    public void deleteById(Long id) {
        //非空校验
        if (id==null||id<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //根据Id查询帖子信息
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article==null || article.getDeleteState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString()+", article id = "+ id);
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        //构造一个更新对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);
        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            //打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));

        }
        //更新板块中的帖子数量
        boardService.subOneArticleCountById(article.getBoardId());
        //更新用户的发帖数
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功， article id= "+article.getId()+", user id = " +article.getUserId() );
    }

    @Override
    public void addOneReplyCountById(Long id) {
        //非空校验
        if (id==null||id<=0){
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子记录
        Article article = articleMapper.selectByPrimaryKey(id);
        //校验帖子状态
        if (article==null || article.getDeleteState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //帖子已封贴
        if (article.getState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构造更新对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        //回复数量=原回复数 + 1
        updateArticle.setReplyCount(article.getReplyCount() + 1);
        updateArticle.setUpdateTime(new Date());
        //执行更新操作
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1){
            //打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }

    }


}
